- Montana Environmental Trust Group

2015–2016 East Helena Groundwater Monitoring Report

July 1, 2017

Now Available:
2015-2016 East Helena Groundwater Monitoring Report, East Helena Facility, Prepared December 2017

2016 East Helena Slag Pile Cover Concepts Technical Memo, Dec 2016

December 18, 2016

Now available:

Technical Memorandum, Slag Pile Cover Concepts for the East Helena Former ASARCO Smelter Site. Prepared December 2016. This Memo provides an update to the September 2016 Slag Pile Cover Concepts, with a recommended cover concept for the slag pile at the Site.

Download the PDF here.

2016 Fact Sheet: East Helena Cleanup—A Model of Environmental Protection and Sustainability, September 2016

September 22, 2016

This Fact Sheet was prepared by the U.S. Environmental Protection Agency (EPA) and the Montana Environmental Trust Group, LLC, Trustee of the Montana Environmental Custodial Trust. It covers the environmental challenge of the former ASARCO Smelter in East Helena, the cleanup solution, the results, and what comes next.

Download this 9.48 MB PDF

2016 Technical Memo: Existing Information and Data Compilation for Slag Pile Area, May 2016

May 23, 2016

Technical Memorandum – Existing Information and Data Compilation for the Former East Helena Smelter Slag Pile Area, May 2016. Download the PDF here.

2016 Groundwater and Surface Water Corrective Action Monitoring Plan, April 2016

April 25, 2016

2016 Groundwater and Surface Water Corrective Action Monitoring Plan for the former ASARCO East Helena Facility, prepared April 2016. Download the PDF here.